Reversing-valve.



PATENTED' JUNE 6, 1905.

J. WHITELAW. REVERSING VALVE.

APPLIGATION FILED snmza, 1904.

R SHEETS-SHBET 2.

avwewcoz J. Whitelaw.

PATENTED JUNE 6, 1905.

J. WHITELAW.

REVERSING VALVE.

APPLIOATION FILED $52123, 1904.

3 SHEETS-SHEET 3.

Z .w w. 0 W H m m n M0 wwmeooeo UNITED STATES Patented June 6, 1905.

JAMES WVHITELAWV, OF ST. LOUIS, MISSOURI.

REVERSlNG-VALVE.

SPECIFICATION forming part of Letters Patent No. 791,966, dated June 6,1905.

Application filed September 23, 1904. Serial No. 225,608.

To all wit/mt it may concern:

Be it known that 1, JAMES XVI-IITELAW, a citizen of the United States,residing at the city of St. Louis, State of Missouri, have invented acertain new and useful Reversing-Valve, of which the following is such afull, clear, and exact description as will enable any one skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, forming part of this specification.

My invention relates to a reversing-valve, and is more particularlyintended to be used in connection with a fluid-motor like that shown inmy application, Serial No. 174,700, filed September 26, 1903.

The object of my invention is to produce a reversing-valve which will besimple in construction and reliable in operation.

In the accompanying drawings, which illustrate two forms ofreversing-valve made in accordance with my invention, together with afluid-motor to which the same is applied, Figure 1 is a verticalsection. Fig. 2 is asection on the line 2 2 of Fig. 1, showing thevalve-casing and controlling-valves. Fig. 3 is a section on the line 3 3of Fig. 1. Fig. t is an enlarged isometric projection of thevalve-casing. Fig. 5 is alongitudinal section of the reversing-valve.Fig. 6 is a section through the valve-casing, taken on the line 6 6 ofFig. 1; and Figs. 7and 8 are a horizontal and a vertical section,respectively, showing a slightly-modified form of valve and valve-casing.

Like marks of reference refer to similar parts in the several views ofthe drawings.

10 indicates the main casing or housing of the motor. Formed in thiscasingor housing 10 are cylinders 11, containing pistons driving acrank-shaft 12. This crank-shaft 12 is connected by intermediate gearing13 with a master wheel 14, provided with suitable means, such as thesocket 15, for connecting the motor to a drill or other tool.

The parts above referred to are fully described in my prior application,and hence will not be described in detail in the present application.

is the valve-casing. This casing 20 contains the reversing-valve 21 andthe controlling-valves 22, which control the flow of motive fluid to andfrom the cylinders 11. The casing 20 also contains the feed-screw 23, bymeans of which the drill or other tool is fed to the work. Thereversing-valve 21 is hollow and cylindrical in form and fits in asuitable cylindrical passage 24 in the valve-casing 20. One end of thevalve 21 projects beyond the casing and is provided with a handle 25, bymeans of which the valve is rotated to reverse the supply and exhaust ofthe motive fluid and also to stop the motor by cutting off the supply ofmotive fluid. In one end of the valve 21 are two diametrically oppositeopenings 26, which are adapted to be brought into register with thesupply-opening 27 in the lower face of the casing 20, through which thesupply of motive fluid is led to the valve 21. When the valve is turnedin such a position that neither of the openings 26 are in register withthe supply-opening 27. the motive fluid is cut off and the motor isstopped. The valve 21 is also provided at an intermediate point in itslength with two diametrically opposite ports 28. These ports 28 aredivided by an inclined partition 29, and each is adapted to be placedinto register with a port 30. (Best shown in Fig. 1.) This port 30communicates, through passages 31 in the sides of the valvecasing 20,with two cross-passages 32, thus supplying the motive fluid to theinterior of the two controlling-valves 22 through passages 33. Thevalve-casing 20 is also provided with a U-shaped passage 36, which hastwo openings into the passage 24, containing the valve 21. The valve 21is provided with a pair of ports 36 and 37, one at each side of thepartition 29. The port 36 is adapted to be brought into register withone opening of the passage 35, and the port 37 is adapted to be broughtinto register with the other opening of said passage. The end of thevalve 21 is open, so that it is always in communication with theexhaust-port 38, which exhausts the motive fluid from the casing. Thepassage 35, hereinbefore described, communicates, through a passage 39,with an enlarged chamber 40 in the valve-casing 20, and this chamberplaces the motive fluid or exhaust, as the case may be, in communicationwith the outer ports in the controlling-valves 22.

; tit

In Figs. 7 and 8 I have shown a slightlymodified form of valve-casingand valve. In this construction the valvecasing is provided with anextension 45, in which is formed a U-shaped passage a6, similar to thepassage 35, hereinbefore described, but shorter. One end of this passage46 is adapted to register with the port 36 in the valve 21 when thevalve is turned in one position, and the other end of the said passage46 is adapted to register with the port 37 in the said valve when thevalve is turned in the other position. Extending downwardly from theU-shapcd passage 46 is a passage $7. This passage 47 communicates, bymeans of a cross-passage IS, with the passages 31 in the sides of thevalve-easing hereinbet'ore described. In this construction the two ports28 are omitted from the valve 21, and consequently the partition 29 maybe made perpendicular to the axis of the valve in place of beinginclined thereto.

It will be evident from the above description that when thereversing-valve 21 is in the position shown in Fig. 6 the supply ofmotive fluid will pass down through one of the ports 28 and the port 30into the passages 31 and will be thus placed in communication with theinternal ports in the controlling-valves 22. At the same time theexternal ports of the controlling-valves 22 will communicate, throughthe passage 39 and the passage 35, with the port 37 in the valve 21 andthence with the external port 38. The motor will thus run in onedirection. By turning the valve 21 a half-revolution, however, thesupply will pass through the port 36 into the passage and thence downthrough the passage 39 to the chamber 10, and the external ports of thecontrolling-valves 22 will thus be in communication with the supply,while the internal ports will be in communication with the exhaustthrough the passages 33, 32, 31, and 30. As the passage 30 is now incommunication with the port 28 at the rear side of the dividingwall 29,and consequently communicates with the exhaust 38, it will be seen thatin this position the supply and exhaust are reversed, and consequentlythe motor will run in the opposite direction. By turning the valve 21one-fourth of a revolution from the position shown in Fig. 6 both of theports 26 will be moved out of register with the supply-port 27, andconsequently no motive fluid can enter the valve-casing.

The operation of the form of valve shown in Figs. 7 and 8 will besubstantially the same as that above described. In place, however, ofthe motive fluid passing to or from the interior of the valves by way ofone of the ports 28 and passages 30 and 31 it will pass to or from saidchamber by way of the U-shaped passage 16 and the passages 47, 48, and31.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

1. The combination with one or more controlling-valves, of afluid-supply and an exhaust, a reversingwalve interposed between saidsupply and said controlling valve or valves and also communicating withsaid exhaust, and two passages extending between said reversing valveand said controlling valve or valves, one of said passages having twoopenings or ports each adapted to communicate with a port in saidreversing-valve.

2. The combination with one or more controlling-valves, of afluid-supply and an exhaust, a hollow rotary reversing-valve interposedbetween said supply and said controlling'valve or valves and alsocommunicating with the exhaust, said reversing-valve being provided witha partition and a port at each side of said partition, and two passagesextending between said reversing-valve and said controlling valve orvalves, one of said passages having two openings or ports each adaptedto communicate with one of the ports in said reversing-valve.

3. The combination with one or more controlling-valves, of afluid-supply and an exhaust, a hollow rotary reversing-valve interposedbetween said supply and said controlling valve or valves and alsocommunicating with the exhaust, said reversing-mlve being provided witha partition and two pairs of ports, one port of each pair being at eachside of said partition, and two passages extending between saidreversing-valve and said controlling valve or valves, one of saidpassages having two openings adapted to communicate with one pair ofports in said reversing-valve, and the other passage having a singleopening adapted to communicate with the other set of ports in saidreversing-valve.

4. The combination with one or more controlling-valves, of afluid-supply and an exhaust, a hollow rotary reversing-valve interposedbetween said supply and said controlling valve or valves and alsocommunicating with the exhaust, said reversing-valve being provided witha partition and two pairs of ports, one port of each pair being at eachside of said partition and one pair of ports being diametricallyopposite each other, and two passages extending between saidreversingvalve and said controlling valve or valves, one of saidpassages having two openings adapted to communicate with one pair ofports in said reversing-valve, and the other passage having a singleopening adapted to communicate with the other set of ports in saidreversing-valve.

In testimony whereof I have hereunto set my hand and affixed my seal inthe presence of the two subscribing witnesses.

A. C. FOWLER, D. C. BETJEMAN.

in s]

